Considering their both injury prone and Atapattu nearing the end of his career, i think thats a fair deal.
These side doesn't look that bad, pretty balanced really:
ODI: Jayasuriya, Tharanga, Sangakkara (wk), Jayawardene (c), Silva, Hopes, Kapugedera, Vaas, Murali, Shoaib, Malinga
Tests: Jayasuriya, Tharanga, Jayawardene (c), Sangakkara (wk), Silva, Hopes, Kapugedera, Vaas, Murali, Shoaib, Malinga
Would rather a better all rounder and a less injury and suspension prone seamer. But its got potential.